The amplitude A is the maximum excursion of a particle of the medium from the particles undisturbed position.
The wavelength is the horizontal length of one cycle of the wave.
The period is the time required for one complete cycle.
The frequency is related to the period and has units of Hz, or s–1. The number of such oscillations per unit time is the frequency of the sound wave. v = 1/T
The speed of sound is defined as the distance which a point on a wave, such as a compression or a rarefaction, travels per unit time.
We know, speed,
Here λ is the wavelength of the sound wave. It is the distance travelled by the sound wave in one time period (T) of the wave. Thus,
That is, speed = wavelength × frequency.
The speed of sound remains almost the same for all frequencies in a given medium.
